Freshwater mussel records collected by the Maryland Department of ...

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Strophitus undulatus Say 1817 was previously encountered at four sites in the Middle Potomac River basin (Figure 19). In 2009, S. undulatus was collected at three sites (Table 1). Investigating their coincident environmental conditions was not possible at this time due to the low number of collection records. Figure 20. Locations where S. undulatus (creeper) was collected. 46
Corbicula fluminea is a non-native bivalve that was introduced in the United States around the 1920s (Counts 1986) and has been documented throughout much of the flowing waters of Maryland. In 2009, C. fluminea was collected at 31 sites; seven sites were where they were previously encountered. They were found in the Gilbert Swamp, Conocheauge Creek, and Middle Chester River watersheds for the first time. The statewide distribution of C. fluminea currently represents 293 sites within 69, 8-digit watersheds of Maryland (Figure 21). There are only a handful of watersheds in the state where they have not been encountered. Figure 21. Locations where C. fluminea (Asiatic clam) was collected. 47
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Freshwater mussel records collected
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Page 6 and 7: List of Figures Figure Number Page
Page 8 and 9: List of Tables Table Number Page 1.
Page 11 and 12: INTRODUCTION The diversity of fresh
Page 13 and 14: species richness, host abundance, a
Page 15 and 16: Table 1. Number of sites sampled by
Page 17 and 18: Table 2. Frequency of occurrence fo
Page 19 and 20: Figure 3. continued A P A P A P p =
Page 21 and 22: Figure 3. continued A P A P A P 0 5
Page 23 and 24: Since 2007, A. undulata Say 1817 ha
Page 25 and 26: Anodonta implicata Say 1829 was enc
Page 27 and 28: Table 3. Frequency of occurrence fo
Page 29 and 30: Figure 8. continued A P A P A P p =
Page 31 and 32: Figure 8. continued A P A P A P 0 5
Page 33 and 34: In 2009, E. fisheriana was collecte
Page 35 and 36: Figure 10. Box-and-whisker plots of
Page 37 and 38: Figure 10. continued. A P A P A P 0
Page 39 and 40: Figure 10. continued A P A P A P 0
Page 41 and 42: Elliptio producta Conrad 1836 has p
Page 43 and 44: Lampsilis radiata radiata Gmelin 17
Page 45 and 46: Leptodea ochracea Say 1817 has been
Page 47 and 48: Pyganodon cataracta had previously
Page 49 and 50: Figure 19. Box-and-whisker plots of
Page 51 and 52: Figure 19. continued A P A P A P 0
Page 53: Figure 19. continued A P A P A P 0
Page 57 and 58: (Black 2001, Wang 2007b). A lack of
Page 59 and 60: Maryland (Cummings and Watters 2009
Page 61 and 62: REFERENCES Allan, J.D., & A.S. Flec
Page 63 and 64: Kelly, M.W., & J.M. Rhymer. 2005. P
Page 65 and 66: ——. 1999a. Effects of alien spe
Page 67 and 68: Young, D. 1911. The implantation of
Page 70 and 71: 8-digit watershed Number 8-digit wa
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